Perform the indicated operation.(-6x3 + 9x2 + 4) - (-5x3 + 2x - 5)
A. -11x3 + 9x2 + 2x - 1
B. -x6 + 9x4 - 2x2 + 9
C. -x3 + 9x2 + 2x - 1
D. -x3 + 9x2 - 2x + 9
Answer: D
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Solve the problem.The unpaid balance in an account on May 1 was $184. A purchase of $35 was made on May 3. A $75 payment was made on May 17. The finance charge rate was 1.65% per month of the average daily balance. Find the new balance at the end of May.
A. $145.65 B. $185.10 C. $146.98 D. $110.07
Provide an appropriate response.Find all complex cube roots of z = -8. Write each root in rectangular form.
A. -2, 1 + 
i, -1 - 
i
B. -2, 1 + 
i, 1 - 
i
C. -2, -1 - 
i, 1 - 
i
D. -2, -1 + 
i, -1 - 
i
Solve the inequality.
? 0
A. (-?, -9) or [-3, 5) or [11, ?) B. (-?, -9) or [-3, 0) or (0, 5) or [11, ?) C. (-?, -9) or [11, ?) D. (-9, -3] or (5, 11]
Solve the problem.The function f(x) = 800(0.5)x/100 models the amount in pounds of a particular radioactive material stored in a concrete vault, where x is the number of years since the material was put into the vault. Find the amount of radioactive material in the vault after 
Round to the nearest whole number.
A. 214 pounds B. 211 pounds C. 555 pounds D. 760 pounds